132 U.S. NATIONAL MUSEUM BULLETIN 233 



Arizona, and Texas, The records from Texas refer to the eastern 

 race of the oriole, sennetti; the Arizona and Cahfornia instances relate 

 to the race nelsoni. 



Scott (1885, p. 163) recorded a parasitized nest m Arizona; Beudh-e 

 (1895, p. 475) wrote that the eastern race was imposed upon consider- 

 ably by both the dwarf cowbird and the red-eyed cowbird and that 

 occasionally one nest held eggs of both species of parasites. Near 

 Brownsville, Texas, in May, 1924, I (1925, p. 550) found 16 nests 

 of the hooded oriole, one of which was parasitized by the dwarf 

 race of the cowbird. Two additional parasitized sets of eggs from 

 Brownsville, Texas, taken in 1928, are now in the collections of the 

 Carnegie Museum. In the C. E. Doe collection m the Florida State 

 Museum there is a parasitized set of eggs taken in Hidalgo County, 

 Texas, on May 22, 1878. 



Abbott (1933, pp. 124-125) found a nest with 4 eggs of the oriole 

 and 2 of the cowbird on June 8 in California (locality not given). 

 Rowley (1930, pp. 130-131), in southern California, late in the after- 

 noon of a day in May, saw a female hooded oriole leave her nest. A few 

 minutes later, a female brown-headed cowbkd flew to the nest and 

 entered it. The cowbird remamed in the nest not more than two or 

 three minutes, during which time she laid her egg and either lacked 

 out or removed with her bill one of the oriole's eggs. Rowley found the 

 oriole egg on the ground where it had been dropped. A similar obser- 

 vation was made by Allanson (in litt., to J. T. Zimmer). 



EUis (1924, p. 208) and Bennett (1943, p. 240) report that hooded 

 orioles were seen feeding recently fledged cowbirds in southern Cali- 

 fornia — evidence that this host can and does rear the young parasite 

 beyond the nestling stage. Two nests of the hooded oriole, collected 

 in 1917 at Tucson, Arizona, and now in the collection of the Santa 

 Barbara Museum of Natural History, each contained 1 egg of the 

 dwarf race of the brown-headed cowbkd, 1 of the bronzed cowbird, 

 and 2 of the oriole. Another parasitized set, collected at Tucson, 

 by J. W. Lytle, on June 2, 1897, is now in the Museum of Natural 

 History at the University of Minnesota. 



Baltimore Oriole 



Icterus galbula (Linnaeus) 



This oriole is parasitized very infrequently by the brown-headed 

 cowbu'd; only 13 actual cases have been noted and no observer has 

 written that this bird is a common victim anywhere in its range. The 

 records involve two races of the parasite: artemisiae in Alberta and 

 Saskatchewan; ater in New York, Pennsylvania, Indiana, Michigan, 

 Minnesota, Wisconsin, and Iowa. 



Warren (1890, pp. 209-210), in Pennsylvania, on three occasions 



